# 2020 Mazda CX-5 - Brake issues

**URL:** <https://community.cartalk.com/t/2020-mazda-cx-5-brake-issues/195875>\
**Category:** Maintenance/Repairs\
**Tags:** mazda\
**Created:** [August 20, 2024, 3:23pm UTC](https://community.cartalk.com/t/2020-mazda-cx-5-brake-issues/195875 "2024-08-20T15:23:38Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![alcjr.6363](https://avatars.discourse-cdn.com/v4/letter/a/cc9497/32.png) [@alcjr.6363](https://community.cartalk.com/u/alcjr.6363)\
**Post date:** [August 20, 2024, 3:23pm UTC](https://community.cartalk.com/t/2020-mazda-cx-5-brake-issues/195875/1 "2024-08-20T15:23:38Z")

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brake pedal soft. found master cylinder leaking from piston seal. changed master and bleed system. still soft. did the brake booster get damaged.???

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**Author:** ![Tester](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/tester/32/15976_2.png) [@Tester](https://community.cartalk.com/u/Tester)\
**Post date:** [August 20, 2024, 5:32pm UTC](https://community.cartalk.com/t/2020-mazda-cx-5-brake-issues/195875/2 "2024-08-20T17:32:10Z")

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It usually requires a factory level scan tool to bleed the ABS after the system has been opened to replace a component.

Tester

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**Author:** ![George\_San\_Jose1](https://avatars.discourse-cdn.com/v4/letter/g/e5b9ba/32.png) [@George\_San\_Jose1](https://community.cartalk.com/u/George_San_Jose1)\
**Post date:** [August 20, 2024, 11:42pm UTC](https://community.cartalk.com/t/2020-mazda-cx-5-brake-issues/195875/3 "2024-08-20T23:42:26Z")

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It’s easy enough for a diy’er to test that the booster holds vacuum. worth doing, but my guess is the same as above, the "softness " problem will only go away after a proper brake system bleed procedure. And this often requires commanding special modes of the ABS valves requiring a scan tool with those capabilities; i.e. best to hire the pro’s do this step for you.

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**Author:** ![cigroller](https://avatars.discourse-cdn.com/v4/letter/c/c68b51/32.png) [@cigroller](https://community.cartalk.com/u/cigroller)\
**Post date:** [August 21, 2024, 2:03am UTC](https://community.cartalk.com/t/2020-mazda-cx-5-brake-issues/195875/4 "2024-08-21T02:03:11Z")

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If your booster wasn’t working right the pedal would get harder not softer. (Though I’ll be happy to hear of failure modes that make it softer - ?)

Did you bench bleed the master before installing?